Reissa roni Evenhuis & Báez, 2001

Greathead, D. J. & Evenhuis, N. L., 2001, Annotated keys to the genera of African Bombylioidea (Diptera: Bombyliidae; Mythicomyiidae), African Invertebrates 42 (1820), pp. 105-224 : 128

Reissa roni Evenhuis & Báez sp. n.

( Figs 31 , 39 )

Etymology: The species is named for Ronald Englund, friend and colleague of NLE, and who has contributed much rare and interesting Diptera material through his extensive collecting activities.

Material examined: Holotype Ò and 1Ò4^ from SPAIN: Canary Is: Tenerife I: Las Cañadas, 12.iv.84, M. Báez . Holotype in MABC; paratypes in MABC and BPBM .

Description: Ò^. Length: 0.98–1.06 mm. Head: Black; occiput black, yellow laterally; postgena yellow; eyes dichoptic, separated at vertex by slightly more than distance between lateral ocelli; frons depressed medially, yellow to yellowwhite; face yellowish, tip of oral margin brown; antennae black; scape minute; pedicel cylindrical, slightly wider than long; first flagellomere ovoid, length about 1.5 x greatest width; second flagellomere about third length of first, with subapical style; venter of head yellowish, shiny; proboscis dark brown, length slightly longer than head height; labrum sclerotised, stiff, pointed apically, length slightly less than height of oral margin; palpus not evident. Thorax: Mesonotum and scutellum subshining dark brown to black, with scattered dark hairs; humeral callus, thin notopleural line to wing base and thin ridge along postalar callus yellow; coxae and legs brown, trochanters and apices of femora yellowish; halter stem brown, knob yellow. Wing ( Fig. 31 ): Hyaline; veins brown; costa extends completely around wing, as thin vein beyond end of vein R 4+5; vein Sc incomplete, ending at level just beyond origin of Rs; Rs evanescent at connection with R 1; R 4+5 straight to wing margin, not curved; vein separating cells br and bm evanescent; vein M 1 slightly curved toward wing margin; M 2 fairly straight to wing margin; crossvein dm-cu closing discal cell present; discal cell short, subequal in width and height; vein A 1 evanescent; sparse fringe of hair on posterior margin of wing rather long. Abdomen: Dorsum dark brown, with scattered dark hairs, pale brown posteriorly on terga 3– 6; venter brown. Male genitalia ( Fig. 39 ): Gonocoxae extremely reduced in size, gonostyli absent, gonocoxal apodemes present, extending below epiphallus to level of middle of aedeagal apodeme; epiphallus with extremely long, thin aedeagal tube, recurved upon itself at base; aedeagal tip bifid; aedeagal apodeme axe-shaped in lateral view; epandrium subrectangular, with large cerci that extend below and above epandrium, posterodorsal corner of epandrium ( Fig. 39 c ) with sharply pointed inner projection, surstylus-like. Female genitalia not dissected.

Figures

Figs 31–34. Mythicomyiidae wings. 31. Reissa roni Evenhuis and Báez sp. n. 32. Doliopteryx welwitschia Evenhuis. 33. Pseudoglabellula meridionalis Hesse. 34. Empidideicus zuluensis (Hesse).

Fig. 39. Reissa roni Evenhuis and Báez sp. n., male genitalia. a. lateral view. b. gonocoxa and phallic complex, ventral view. c. epandrium, ventral view.